Markings to identify Balance for Narroline Double-Hung Window

A handy person from Pittsburgh, PA says:
Andersen Corporation
Bayport, Minn.

Above Andersen Brand is 11600R-2
Lower Right Edge is marked: E50 8#37 10 86

If I had to guess, I would guess this is a Andersen Sash Balance 837?
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Yes! Our 24-837 can replace balance boxes with the stamp 8#37.
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